![Dan Carpenter](/assets/img/avatar_default.png)
On 64 bit then -1UL and -1U are not equal, so these conditions don't work as intended and it breaks error handling. Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Acked-by: Sumit Saxena <sumit.saxena@lsi.com> Signed-off-by: James Bottomley <JBottomley@Parallels.com>
1226 lines
35 KiB
C
1226 lines
35 KiB
C
/*
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* Linux MegaRAID driver for SAS based RAID controllers
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*
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* Copyright (c) 2009-2012 LSI Corporation.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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* FILE: megaraid_sas_fp.c
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*
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* Authors: LSI Corporation
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* Sumant Patro
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* Varad Talamacki
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* Manoj Jose
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*
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* Send feedback to: <megaraidlinux@lsi.com>
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*
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* Mail to: LSI Corporation, 1621 Barber Lane, Milpitas, CA 95035
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* ATTN: Linuxraid
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*/
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#include <linux/kernel.h>
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#include <linux/types.h>
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#include <linux/pci.h>
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#include <linux/list.h>
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#include <linux/moduleparam.h>
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#include <linux/module.h>
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#include <linux/spinlock.h>
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#include <linux/interrupt.h>
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#include <linux/delay.h>
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#include <linux/uio.h>
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#include <linux/uaccess.h>
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#include <linux/fs.h>
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#include <linux/compat.h>
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#include <linux/blkdev.h>
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#include <linux/poll.h>
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#include <scsi/scsi.h>
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#include <scsi/scsi_cmnd.h>
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#include <scsi/scsi_device.h>
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#include <scsi/scsi_host.h>
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#include "megaraid_sas_fusion.h"
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#include "megaraid_sas.h"
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#include <asm/div64.h>
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#define ABS_DIFF(a, b) (((a) > (b)) ? ((a) - (b)) : ((b) - (a)))
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#define MR_LD_STATE_OPTIMAL 3
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#define FALSE 0
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#define TRUE 1
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#define SPAN_DEBUG 0
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#define SPAN_ROW_SIZE(map, ld, index_) (MR_LdSpanPtrGet(ld, index_, map)->spanRowSize)
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#define SPAN_ROW_DATA_SIZE(map_, ld, index_) (MR_LdSpanPtrGet(ld, index_, map)->spanRowDataSize)
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#define SPAN_INVALID 0xff
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/* Prototypes */
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void mr_update_load_balance_params(struct MR_FW_RAID_MAP_ALL *map,
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struct LD_LOAD_BALANCE_INFO *lbInfo);
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static void mr_update_span_set(struct MR_FW_RAID_MAP_ALL *map,
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PLD_SPAN_INFO ldSpanInfo);
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static u8 mr_spanset_get_phy_params(struct megasas_instance *instance, u32 ld,
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u64 stripRow, u16 stripRef, struct IO_REQUEST_INFO *io_info,
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struct RAID_CONTEXT *pRAID_Context, struct MR_FW_RAID_MAP_ALL *map);
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static u64 get_row_from_strip(struct megasas_instance *instance, u32 ld,
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u64 strip, struct MR_FW_RAID_MAP_ALL *map);
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u32 mega_mod64(u64 dividend, u32 divisor)
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{
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u64 d;
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u32 remainder;
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if (!divisor)
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printk(KERN_ERR "megasas : DIVISOR is zero, in div fn\n");
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d = dividend;
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remainder = do_div(d, divisor);
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return remainder;
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}
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/**
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* @param dividend : Dividend
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* @param divisor : Divisor
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*
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* @return quotient
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**/
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u64 mega_div64_32(uint64_t dividend, uint32_t divisor)
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{
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u32 remainder;
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u64 d;
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if (!divisor)
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printk(KERN_ERR "megasas : DIVISOR is zero in mod fn\n");
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d = dividend;
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remainder = do_div(d, divisor);
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return d;
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}
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struct MR_LD_RAID *MR_LdRaidGet(u32 ld, struct MR_FW_RAID_MAP_ALL *map)
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{
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return &map->raidMap.ldSpanMap[ld].ldRaid;
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}
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static struct MR_SPAN_BLOCK_INFO *MR_LdSpanInfoGet(u32 ld,
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struct MR_FW_RAID_MAP_ALL
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*map)
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{
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return &map->raidMap.ldSpanMap[ld].spanBlock[0];
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}
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static u8 MR_LdDataArmGet(u32 ld, u32 armIdx, struct MR_FW_RAID_MAP_ALL *map)
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{
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return map->raidMap.ldSpanMap[ld].dataArmMap[armIdx];
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}
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static u16 MR_ArPdGet(u32 ar, u32 arm, struct MR_FW_RAID_MAP_ALL *map)
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{
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return map->raidMap.arMapInfo[ar].pd[arm];
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}
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static u16 MR_LdSpanArrayGet(u32 ld, u32 span, struct MR_FW_RAID_MAP_ALL *map)
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{
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return map->raidMap.ldSpanMap[ld].spanBlock[span].span.arrayRef;
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}
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static u16 MR_PdDevHandleGet(u32 pd, struct MR_FW_RAID_MAP_ALL *map)
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{
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return map->raidMap.devHndlInfo[pd].curDevHdl;
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}
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u16 MR_GetLDTgtId(u32 ld, struct MR_FW_RAID_MAP_ALL *map)
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{
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return map->raidMap.ldSpanMap[ld].ldRaid.targetId;
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}
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u16 MR_TargetIdToLdGet(u32 ldTgtId, struct MR_FW_RAID_MAP_ALL *map)
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{
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return map->raidMap.ldTgtIdToLd[ldTgtId];
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}
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static struct MR_LD_SPAN *MR_LdSpanPtrGet(u32 ld, u32 span,
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struct MR_FW_RAID_MAP_ALL *map)
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{
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return &map->raidMap.ldSpanMap[ld].spanBlock[span].span;
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}
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/*
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* This function will validate Map info data provided by FW
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*/
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u8 MR_ValidateMapInfo(struct megasas_instance *instance)
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{
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struct fusion_context *fusion = instance->ctrl_context;
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struct MR_FW_RAID_MAP_ALL *map = fusion->ld_map[(instance->map_id & 1)];
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struct LD_LOAD_BALANCE_INFO *lbInfo = fusion->load_balance_info;
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PLD_SPAN_INFO ldSpanInfo = fusion->log_to_span;
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struct MR_FW_RAID_MAP *pFwRaidMap = &map->raidMap;
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if (pFwRaidMap->totalSize !=
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(sizeof(struct MR_FW_RAID_MAP) -sizeof(struct MR_LD_SPAN_MAP) +
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(sizeof(struct MR_LD_SPAN_MAP) *pFwRaidMap->ldCount))) {
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printk(KERN_ERR "megasas: map info structure size 0x%x is not matching with ld count\n",
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(unsigned int)((sizeof(struct MR_FW_RAID_MAP) -
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sizeof(struct MR_LD_SPAN_MAP)) +
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(sizeof(struct MR_LD_SPAN_MAP) *
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pFwRaidMap->ldCount)));
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printk(KERN_ERR "megasas: span map %x, pFwRaidMap->totalSize "
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": %x\n", (unsigned int)sizeof(struct MR_LD_SPAN_MAP),
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pFwRaidMap->totalSize);
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return 0;
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}
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if (instance->UnevenSpanSupport)
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mr_update_span_set(map, ldSpanInfo);
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mr_update_load_balance_params(map, lbInfo);
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return 1;
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}
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u32 MR_GetSpanBlock(u32 ld, u64 row, u64 *span_blk,
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struct MR_FW_RAID_MAP_ALL *map)
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{
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struct MR_SPAN_BLOCK_INFO *pSpanBlock = MR_LdSpanInfoGet(ld, map);
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struct MR_QUAD_ELEMENT *quad;
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struct MR_LD_RAID *raid = MR_LdRaidGet(ld, map);
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u32 span, j;
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for (span = 0; span < raid->spanDepth; span++, pSpanBlock++) {
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for (j = 0; j < pSpanBlock->block_span_info.noElements; j++) {
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quad = &pSpanBlock->block_span_info.quad[j];
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if (quad->diff == 0)
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return SPAN_INVALID;
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if (quad->logStart <= row && row <= quad->logEnd &&
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(mega_mod64(row-quad->logStart, quad->diff)) == 0) {
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if (span_blk != NULL) {
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u64 blk, debugBlk;
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blk =
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mega_div64_32(
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(row-quad->logStart),
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quad->diff);
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debugBlk = blk;
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blk = (blk + quad->offsetInSpan) <<
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raid->stripeShift;
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*span_blk = blk;
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}
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return span;
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}
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}
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}
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return SPAN_INVALID;
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}
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/*
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******************************************************************************
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*
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* Function to print info about span set created in driver from FW raid map
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*
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* Inputs :
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* map - LD map
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* ldSpanInfo - ldSpanInfo per HBA instance
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*/
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#if SPAN_DEBUG
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static int getSpanInfo(struct MR_FW_RAID_MAP_ALL *map, PLD_SPAN_INFO ldSpanInfo)
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{
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u8 span;
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u32 element;
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struct MR_LD_RAID *raid;
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LD_SPAN_SET *span_set;
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struct MR_QUAD_ELEMENT *quad;
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int ldCount;
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u16 ld;
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for (ldCount = 0; ldCount < MAX_LOGICAL_DRIVES; ldCount++) {
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ld = MR_TargetIdToLdGet(ldCount, map);
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if (ld >= MAX_LOGICAL_DRIVES)
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continue;
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raid = MR_LdRaidGet(ld, map);
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dev_dbg(&instance->pdev->dev, "LD %x: span_depth=%x\n",
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ld, raid->spanDepth);
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for (span = 0; span < raid->spanDepth; span++)
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dev_dbg(&instance->pdev->dev, "Span=%x,"
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" number of quads=%x\n", span,
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map->raidMap.ldSpanMap[ld].spanBlock[span].
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block_span_info.noElements);
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for (element = 0; element < MAX_QUAD_DEPTH; element++) {
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span_set = &(ldSpanInfo[ld].span_set[element]);
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if (span_set->span_row_data_width == 0)
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break;
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dev_dbg(&instance->pdev->dev, "Span Set %x:"
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"width=%x, diff=%x\n", element,
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(unsigned int)span_set->span_row_data_width,
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(unsigned int)span_set->diff);
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dev_dbg(&instance->pdev->dev, "logical LBA"
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"start=0x%08lx, end=0x%08lx\n",
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(long unsigned int)span_set->log_start_lba,
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(long unsigned int)span_set->log_end_lba);
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dev_dbg(&instance->pdev->dev, "span row start=0x%08lx,"
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" end=0x%08lx\n",
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(long unsigned int)span_set->span_row_start,
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(long unsigned int)span_set->span_row_end);
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dev_dbg(&instance->pdev->dev, "data row start=0x%08lx,"
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" end=0x%08lx\n",
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(long unsigned int)span_set->data_row_start,
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(long unsigned int)span_set->data_row_end);
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dev_dbg(&instance->pdev->dev, "data strip start=0x%08lx,"
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" end=0x%08lx\n",
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(long unsigned int)span_set->data_strip_start,
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(long unsigned int)span_set->data_strip_end);
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for (span = 0; span < raid->spanDepth; span++) {
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if (map->raidMap.ldSpanMap[ld].spanBlock[span].
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block_span_info.noElements >=
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element + 1) {
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quad = &map->raidMap.ldSpanMap[ld].
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spanBlock[span].block_span_info.
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quad[element];
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dev_dbg(&instance->pdev->dev, "Span=%x,"
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"Quad=%x, diff=%x\n", span,
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element, quad->diff);
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dev_dbg(&instance->pdev->dev,
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"offset_in_span=0x%08lx\n",
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(long unsigned int)quad->offsetInSpan);
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dev_dbg(&instance->pdev->dev,
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"logical start=0x%08lx, end=0x%08lx\n",
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(long unsigned int)quad->logStart,
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(long unsigned int)quad->logEnd);
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}
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}
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}
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}
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return 0;
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}
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#endif
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/*
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******************************************************************************
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*
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* This routine calculates the Span block for given row using spanset.
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*
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* Inputs :
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* instance - HBA instance
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* ld - Logical drive number
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* row - Row number
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* map - LD map
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*
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* Outputs :
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*
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* span - Span number
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* block - Absolute Block number in the physical disk
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* div_error - Devide error code.
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*/
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u32 mr_spanset_get_span_block(struct megasas_instance *instance,
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u32 ld, u64 row, u64 *span_blk, struct MR_FW_RAID_MAP_ALL *map)
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{
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struct fusion_context *fusion = instance->ctrl_context;
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struct MR_LD_RAID *raid = MR_LdRaidGet(ld, map);
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LD_SPAN_SET *span_set;
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struct MR_QUAD_ELEMENT *quad;
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u32 span, info;
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PLD_SPAN_INFO ldSpanInfo = fusion->log_to_span;
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for (info = 0; info < MAX_QUAD_DEPTH; info++) {
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span_set = &(ldSpanInfo[ld].span_set[info]);
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if (span_set->span_row_data_width == 0)
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break;
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if (row > span_set->data_row_end)
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continue;
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for (span = 0; span < raid->spanDepth; span++)
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if (map->raidMap.ldSpanMap[ld].spanBlock[span].
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block_span_info.noElements >= info+1) {
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quad = &map->raidMap.ldSpanMap[ld].
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spanBlock[span].
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block_span_info.quad[info];
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if (quad->diff == 0)
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return SPAN_INVALID;
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if (quad->logStart <= row &&
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row <= quad->logEnd &&
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(mega_mod64(row - quad->logStart,
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quad->diff)) == 0) {
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if (span_blk != NULL) {
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u64 blk;
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blk = mega_div64_32
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((row - quad->logStart),
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quad->diff);
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blk = (blk + quad->offsetInSpan)
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<< raid->stripeShift;
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*span_blk = blk;
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}
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return span;
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}
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}
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}
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return SPAN_INVALID;
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}
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/*
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******************************************************************************
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*
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* This routine calculates the row for given strip using spanset.
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*
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* Inputs :
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* instance - HBA instance
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* ld - Logical drive number
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* Strip - Strip
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* map - LD map
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*
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* Outputs :
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*
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* row - row associated with strip
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*/
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static u64 get_row_from_strip(struct megasas_instance *instance,
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u32 ld, u64 strip, struct MR_FW_RAID_MAP_ALL *map)
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{
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struct fusion_context *fusion = instance->ctrl_context;
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struct MR_LD_RAID *raid = MR_LdRaidGet(ld, map);
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LD_SPAN_SET *span_set;
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PLD_SPAN_INFO ldSpanInfo = fusion->log_to_span;
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u32 info, strip_offset, span, span_offset;
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u64 span_set_Strip, span_set_Row, retval;
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for (info = 0; info < MAX_QUAD_DEPTH; info++) {
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span_set = &(ldSpanInfo[ld].span_set[info]);
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if (span_set->span_row_data_width == 0)
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break;
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if (strip > span_set->data_strip_end)
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continue;
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span_set_Strip = strip - span_set->data_strip_start;
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strip_offset = mega_mod64(span_set_Strip,
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span_set->span_row_data_width);
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span_set_Row = mega_div64_32(span_set_Strip,
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span_set->span_row_data_width) * span_set->diff;
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for (span = 0, span_offset = 0; span < raid->spanDepth; span++)
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if (map->raidMap.ldSpanMap[ld].spanBlock[span].
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block_span_info.noElements >= info+1) {
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if (strip_offset >=
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span_set->strip_offset[span])
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span_offset++;
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else
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break;
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}
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#if SPAN_DEBUG
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dev_info(&instance->pdev->dev, "Strip 0x%llx,"
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"span_set_Strip 0x%llx, span_set_Row 0x%llx"
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"data width 0x%llx span offset 0x%x\n", strip,
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(unsigned long long)span_set_Strip,
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(unsigned long long)span_set_Row,
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(unsigned long long)span_set->span_row_data_width,
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span_offset);
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dev_info(&instance->pdev->dev, "For strip 0x%llx"
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"row is 0x%llx\n", strip,
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(unsigned long long) span_set->data_row_start +
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(unsigned long long) span_set_Row + (span_offset - 1));
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#endif
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retval = (span_set->data_row_start + span_set_Row +
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(span_offset - 1));
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return retval;
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}
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return -1LLU;
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}
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/*
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******************************************************************************
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*
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* This routine calculates the Start Strip for given row using spanset.
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*
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* Inputs :
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* instance - HBA instance
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* ld - Logical drive number
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* row - Row number
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* map - LD map
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*
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* Outputs :
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*
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* Strip - Start strip associated with row
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*/
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static u64 get_strip_from_row(struct megasas_instance *instance,
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u32 ld, u64 row, struct MR_FW_RAID_MAP_ALL *map)
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{
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struct fusion_context *fusion = instance->ctrl_context;
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struct MR_LD_RAID *raid = MR_LdRaidGet(ld, map);
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LD_SPAN_SET *span_set;
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struct MR_QUAD_ELEMENT *quad;
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PLD_SPAN_INFO ldSpanInfo = fusion->log_to_span;
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u32 span, info;
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u64 strip;
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|
|
for (info = 0; info < MAX_QUAD_DEPTH; info++) {
|
|
span_set = &(ldSpanInfo[ld].span_set[info]);
|
|
|
|
if (span_set->span_row_data_width == 0)
|
|
break;
|
|
if (row > span_set->data_row_end)
|
|
continue;
|
|
|
|
for (span = 0; span < raid->spanDepth; span++)
|
|
if (map->raidMap.ldSpanMap[ld].spanBlock[span].
|
|
block_span_info.noElements >= info+1) {
|
|
quad = &map->raidMap.ldSpanMap[ld].
|
|
spanBlock[span].block_span_info.quad[info];
|
|
if (quad->logStart <= row &&
|
|
row <= quad->logEnd &&
|
|
mega_mod64((row - quad->logStart),
|
|
quad->diff) == 0) {
|
|
strip = mega_div64_32
|
|
(((row - span_set->data_row_start)
|
|
- quad->logStart),
|
|
quad->diff);
|
|
strip *= span_set->span_row_data_width;
|
|
strip += span_set->data_strip_start;
|
|
strip += span_set->strip_offset[span];
|
|
return strip;
|
|
}
|
|
}
|
|
}
|
|
dev_err(&instance->pdev->dev, "get_strip_from_row"
|
|
"returns invalid strip for ld=%x, row=%lx\n",
|
|
ld, (long unsigned int)row);
|
|
return -1;
|
|
}
|
|
|
|
/*
|
|
******************************************************************************
|
|
*
|
|
* This routine calculates the Physical Arm for given strip using spanset.
|
|
*
|
|
* Inputs :
|
|
* instance - HBA instance
|
|
* ld - Logical drive number
|
|
* strip - Strip
|
|
* map - LD map
|
|
*
|
|
* Outputs :
|
|
*
|
|
* Phys Arm - Phys Arm associated with strip
|
|
*/
|
|
|
|
static u32 get_arm_from_strip(struct megasas_instance *instance,
|
|
u32 ld, u64 strip, struct MR_FW_RAID_MAP_ALL *map)
|
|
{
|
|
struct fusion_context *fusion = instance->ctrl_context;
|
|
struct MR_LD_RAID *raid = MR_LdRaidGet(ld, map);
|
|
LD_SPAN_SET *span_set;
|
|
PLD_SPAN_INFO ldSpanInfo = fusion->log_to_span;
|
|
u32 info, strip_offset, span, span_offset, retval;
|
|
|
|
for (info = 0 ; info < MAX_QUAD_DEPTH; info++) {
|
|
span_set = &(ldSpanInfo[ld].span_set[info]);
|
|
|
|
if (span_set->span_row_data_width == 0)
|
|
break;
|
|
if (strip > span_set->data_strip_end)
|
|
continue;
|
|
|
|
strip_offset = (uint)mega_mod64
|
|
((strip - span_set->data_strip_start),
|
|
span_set->span_row_data_width);
|
|
|
|
for (span = 0, span_offset = 0; span < raid->spanDepth; span++)
|
|
if (map->raidMap.ldSpanMap[ld].spanBlock[span].
|
|
block_span_info.noElements >= info+1) {
|
|
if (strip_offset >=
|
|
span_set->strip_offset[span])
|
|
span_offset =
|
|
span_set->strip_offset[span];
|
|
else
|
|
break;
|
|
}
|
|
#if SPAN_DEBUG
|
|
dev_info(&instance->pdev->dev, "get_arm_from_strip:"
|
|
"for ld=0x%x strip=0x%lx arm is 0x%x\n", ld,
|
|
(long unsigned int)strip, (strip_offset - span_offset));
|
|
#endif
|
|
retval = (strip_offset - span_offset);
|
|
return retval;
|
|
}
|
|
|
|
dev_err(&instance->pdev->dev, "get_arm_from_strip"
|
|
"returns invalid arm for ld=%x strip=%lx\n",
|
|
ld, (long unsigned int)strip);
|
|
|
|
return -1;
|
|
}
|
|
|
|
/* This Function will return Phys arm */
|
|
u8 get_arm(struct megasas_instance *instance, u32 ld, u8 span, u64 stripe,
|
|
struct MR_FW_RAID_MAP_ALL *map)
|
|
{
|
|
struct MR_LD_RAID *raid = MR_LdRaidGet(ld, map);
|
|
/* Need to check correct default value */
|
|
u32 arm = 0;
|
|
|
|
switch (raid->level) {
|
|
case 0:
|
|
case 5:
|
|
case 6:
|
|
arm = mega_mod64(stripe, SPAN_ROW_SIZE(map, ld, span));
|
|
break;
|
|
case 1:
|
|
/* start with logical arm */
|
|
arm = get_arm_from_strip(instance, ld, stripe, map);
|
|
if (arm != -1U)
|
|
arm *= 2;
|
|
break;
|
|
}
|
|
|
|
return arm;
|
|
}
|
|
|
|
|
|
/*
|
|
******************************************************************************
|
|
*
|
|
* This routine calculates the arm, span and block for the specified stripe and
|
|
* reference in stripe using spanset
|
|
*
|
|
* Inputs :
|
|
*
|
|
* ld - Logical drive number
|
|
* stripRow - Stripe number
|
|
* stripRef - Reference in stripe
|
|
*
|
|
* Outputs :
|
|
*
|
|
* span - Span number
|
|
* block - Absolute Block number in the physical disk
|
|
*/
|
|
static u8 mr_spanset_get_phy_params(struct megasas_instance *instance, u32 ld,
|
|
u64 stripRow, u16 stripRef, struct IO_REQUEST_INFO *io_info,
|
|
struct RAID_CONTEXT *pRAID_Context,
|
|
struct MR_FW_RAID_MAP_ALL *map)
|
|
{
|
|
struct MR_LD_RAID *raid = MR_LdRaidGet(ld, map);
|
|
u32 pd, arRef;
|
|
u8 physArm, span;
|
|
u64 row;
|
|
u8 retval = TRUE;
|
|
u8 do_invader = 0;
|
|
u64 *pdBlock = &io_info->pdBlock;
|
|
u16 *pDevHandle = &io_info->devHandle;
|
|
u32 logArm, rowMod, armQ, arm;
|
|
|
|
if ((instance->pdev->device == PCI_DEVICE_ID_LSI_INVADER ||
|
|
instance->pdev->device == PCI_DEVICE_ID_LSI_FURY))
|
|
do_invader = 1;
|
|
|
|
/*Get row and span from io_info for Uneven Span IO.*/
|
|
row = io_info->start_row;
|
|
span = io_info->start_span;
|
|
|
|
|
|
if (raid->level == 6) {
|
|
logArm = get_arm_from_strip(instance, ld, stripRow, map);
|
|
if (logArm == -1U)
|
|
return FALSE;
|
|
rowMod = mega_mod64(row, SPAN_ROW_SIZE(map, ld, span));
|
|
armQ = SPAN_ROW_SIZE(map, ld, span) - 1 - rowMod;
|
|
arm = armQ + 1 + logArm;
|
|
if (arm >= SPAN_ROW_SIZE(map, ld, span))
|
|
arm -= SPAN_ROW_SIZE(map, ld, span);
|
|
physArm = (u8)arm;
|
|
} else
|
|
/* Calculate the arm */
|
|
physArm = get_arm(instance, ld, span, stripRow, map);
|
|
if (physArm == 0xFF)
|
|
return FALSE;
|
|
|
|
arRef = MR_LdSpanArrayGet(ld, span, map);
|
|
pd = MR_ArPdGet(arRef, physArm, map);
|
|
|
|
if (pd != MR_PD_INVALID)
|
|
*pDevHandle = MR_PdDevHandleGet(pd, map);
|
|
else {
|
|
*pDevHandle = MR_PD_INVALID;
|
|
if ((raid->level >= 5) &&
|
|
(!do_invader || (do_invader &&
|
|
(raid->regTypeReqOnRead != REGION_TYPE_UNUSED))))
|
|
pRAID_Context->regLockFlags = REGION_TYPE_EXCLUSIVE;
|
|
else if (raid->level == 1) {
|
|
pd = MR_ArPdGet(arRef, physArm + 1, map);
|
|
if (pd != MR_PD_INVALID)
|
|
*pDevHandle = MR_PdDevHandleGet(pd, map);
|
|
}
|
|
}
|
|
|
|
*pdBlock += stripRef + MR_LdSpanPtrGet(ld, span, map)->startBlk;
|
|
pRAID_Context->spanArm = (span << RAID_CTX_SPANARM_SPAN_SHIFT) |
|
|
physArm;
|
|
return retval;
|
|
}
|
|
|
|
/*
|
|
******************************************************************************
|
|
*
|
|
* This routine calculates the arm, span and block for the specified stripe and
|
|
* reference in stripe.
|
|
*
|
|
* Inputs :
|
|
*
|
|
* ld - Logical drive number
|
|
* stripRow - Stripe number
|
|
* stripRef - Reference in stripe
|
|
*
|
|
* Outputs :
|
|
*
|
|
* span - Span number
|
|
* block - Absolute Block number in the physical disk
|
|
*/
|
|
u8 MR_GetPhyParams(struct megasas_instance *instance, u32 ld, u64 stripRow,
|
|
u16 stripRef, struct IO_REQUEST_INFO *io_info,
|
|
struct RAID_CONTEXT *pRAID_Context,
|
|
struct MR_FW_RAID_MAP_ALL *map)
|
|
{
|
|
struct MR_LD_RAID *raid = MR_LdRaidGet(ld, map);
|
|
u32 pd, arRef;
|
|
u8 physArm, span;
|
|
u64 row;
|
|
u8 retval = TRUE;
|
|
u8 do_invader = 0;
|
|
u64 *pdBlock = &io_info->pdBlock;
|
|
u16 *pDevHandle = &io_info->devHandle;
|
|
|
|
if ((instance->pdev->device == PCI_DEVICE_ID_LSI_INVADER ||
|
|
instance->pdev->device == PCI_DEVICE_ID_LSI_FURY))
|
|
do_invader = 1;
|
|
|
|
row = mega_div64_32(stripRow, raid->rowDataSize);
|
|
|
|
if (raid->level == 6) {
|
|
/* logical arm within row */
|
|
u32 logArm = mega_mod64(stripRow, raid->rowDataSize);
|
|
u32 rowMod, armQ, arm;
|
|
|
|
if (raid->rowSize == 0)
|
|
return FALSE;
|
|
/* get logical row mod */
|
|
rowMod = mega_mod64(row, raid->rowSize);
|
|
armQ = raid->rowSize-1-rowMod; /* index of Q drive */
|
|
arm = armQ+1+logArm; /* data always logically follows Q */
|
|
if (arm >= raid->rowSize) /* handle wrap condition */
|
|
arm -= raid->rowSize;
|
|
physArm = (u8)arm;
|
|
} else {
|
|
if (raid->modFactor == 0)
|
|
return FALSE;
|
|
physArm = MR_LdDataArmGet(ld, mega_mod64(stripRow,
|
|
raid->modFactor),
|
|
map);
|
|
}
|
|
|
|
if (raid->spanDepth == 1) {
|
|
span = 0;
|
|
*pdBlock = row << raid->stripeShift;
|
|
} else {
|
|
span = (u8)MR_GetSpanBlock(ld, row, pdBlock, map);
|
|
if (span == SPAN_INVALID)
|
|
return FALSE;
|
|
}
|
|
|
|
/* Get the array on which this span is present */
|
|
arRef = MR_LdSpanArrayGet(ld, span, map);
|
|
pd = MR_ArPdGet(arRef, physArm, map); /* Get the pd */
|
|
|
|
if (pd != MR_PD_INVALID)
|
|
/* Get dev handle from Pd. */
|
|
*pDevHandle = MR_PdDevHandleGet(pd, map);
|
|
else {
|
|
*pDevHandle = MR_PD_INVALID; /* set dev handle as invalid. */
|
|
if ((raid->level >= 5) &&
|
|
(!do_invader || (do_invader &&
|
|
(raid->regTypeReqOnRead != REGION_TYPE_UNUSED))))
|
|
pRAID_Context->regLockFlags = REGION_TYPE_EXCLUSIVE;
|
|
else if (raid->level == 1) {
|
|
/* Get alternate Pd. */
|
|
pd = MR_ArPdGet(arRef, physArm + 1, map);
|
|
if (pd != MR_PD_INVALID)
|
|
/* Get dev handle from Pd */
|
|
*pDevHandle = MR_PdDevHandleGet(pd, map);
|
|
}
|
|
}
|
|
|
|
*pdBlock += stripRef + MR_LdSpanPtrGet(ld, span, map)->startBlk;
|
|
pRAID_Context->spanArm = (span << RAID_CTX_SPANARM_SPAN_SHIFT) |
|
|
physArm;
|
|
return retval;
|
|
}
|
|
|
|
/*
|
|
******************************************************************************
|
|
*
|
|
* MR_BuildRaidContext function
|
|
*
|
|
* This function will initiate command processing. The start/end row and strip
|
|
* information is calculated then the lock is acquired.
|
|
* This function will return 0 if region lock was acquired OR return num strips
|
|
*/
|
|
u8
|
|
MR_BuildRaidContext(struct megasas_instance *instance,
|
|
struct IO_REQUEST_INFO *io_info,
|
|
struct RAID_CONTEXT *pRAID_Context,
|
|
struct MR_FW_RAID_MAP_ALL *map)
|
|
{
|
|
struct MR_LD_RAID *raid;
|
|
u32 ld, stripSize, stripe_mask;
|
|
u64 endLba, endStrip, endRow, start_row, start_strip;
|
|
u64 regStart;
|
|
u32 regSize;
|
|
u8 num_strips, numRows;
|
|
u16 ref_in_start_stripe, ref_in_end_stripe;
|
|
u64 ldStartBlock;
|
|
u32 numBlocks, ldTgtId;
|
|
u8 isRead;
|
|
u8 retval = 0;
|
|
u8 startlba_span = SPAN_INVALID;
|
|
u64 *pdBlock = &io_info->pdBlock;
|
|
|
|
ldStartBlock = io_info->ldStartBlock;
|
|
numBlocks = io_info->numBlocks;
|
|
ldTgtId = io_info->ldTgtId;
|
|
isRead = io_info->isRead;
|
|
io_info->IoforUnevenSpan = 0;
|
|
io_info->start_span = SPAN_INVALID;
|
|
|
|
ld = MR_TargetIdToLdGet(ldTgtId, map);
|
|
raid = MR_LdRaidGet(ld, map);
|
|
|
|
/*
|
|
* if rowDataSize @RAID map and spanRowDataSize @SPAN INFO are zero
|
|
* return FALSE
|
|
*/
|
|
if (raid->rowDataSize == 0) {
|
|
if (MR_LdSpanPtrGet(ld, 0, map)->spanRowDataSize == 0)
|
|
return FALSE;
|
|
else if (instance->UnevenSpanSupport) {
|
|
io_info->IoforUnevenSpan = 1;
|
|
} else {
|
|
dev_info(&instance->pdev->dev,
|
|
"raid->rowDataSize is 0, but has SPAN[0]"
|
|
"rowDataSize = 0x%0x,"
|
|
"but there is _NO_ UnevenSpanSupport\n",
|
|
MR_LdSpanPtrGet(ld, 0, map)->spanRowDataSize);
|
|
return FALSE;
|
|
}
|
|
}
|
|
|
|
stripSize = 1 << raid->stripeShift;
|
|
stripe_mask = stripSize-1;
|
|
|
|
|
|
/*
|
|
* calculate starting row and stripe, and number of strips and rows
|
|
*/
|
|
start_strip = ldStartBlock >> raid->stripeShift;
|
|
ref_in_start_stripe = (u16)(ldStartBlock & stripe_mask);
|
|
endLba = ldStartBlock + numBlocks - 1;
|
|
ref_in_end_stripe = (u16)(endLba & stripe_mask);
|
|
endStrip = endLba >> raid->stripeShift;
|
|
num_strips = (u8)(endStrip - start_strip + 1); /* End strip */
|
|
|
|
if (io_info->IoforUnevenSpan) {
|
|
start_row = get_row_from_strip(instance, ld, start_strip, map);
|
|
endRow = get_row_from_strip(instance, ld, endStrip, map);
|
|
if (start_row == -1ULL || endRow == -1ULL) {
|
|
dev_info(&instance->pdev->dev, "return from %s %d."
|
|
"Send IO w/o region lock.\n",
|
|
__func__, __LINE__);
|
|
return FALSE;
|
|
}
|
|
|
|
if (raid->spanDepth == 1) {
|
|
startlba_span = 0;
|
|
*pdBlock = start_row << raid->stripeShift;
|
|
} else
|
|
startlba_span = (u8)mr_spanset_get_span_block(instance,
|
|
ld, start_row, pdBlock, map);
|
|
if (startlba_span == SPAN_INVALID) {
|
|
dev_info(&instance->pdev->dev, "return from %s %d"
|
|
"for row 0x%llx,start strip %llx"
|
|
"endSrip %llx\n", __func__, __LINE__,
|
|
(unsigned long long)start_row,
|
|
(unsigned long long)start_strip,
|
|
(unsigned long long)endStrip);
|
|
return FALSE;
|
|
}
|
|
io_info->start_span = startlba_span;
|
|
io_info->start_row = start_row;
|
|
#if SPAN_DEBUG
|
|
dev_dbg(&instance->pdev->dev, "Check Span number from %s %d"
|
|
"for row 0x%llx, start strip 0x%llx end strip 0x%llx"
|
|
" span 0x%x\n", __func__, __LINE__,
|
|
(unsigned long long)start_row,
|
|
(unsigned long long)start_strip,
|
|
(unsigned long long)endStrip, startlba_span);
|
|
dev_dbg(&instance->pdev->dev, "start_row 0x%llx endRow 0x%llx"
|
|
"Start span 0x%x\n", (unsigned long long)start_row,
|
|
(unsigned long long)endRow, startlba_span);
|
|
#endif
|
|
} else {
|
|
start_row = mega_div64_32(start_strip, raid->rowDataSize);
|
|
endRow = mega_div64_32(endStrip, raid->rowDataSize);
|
|
}
|
|
numRows = (u8)(endRow - start_row + 1);
|
|
|
|
/*
|
|
* calculate region info.
|
|
*/
|
|
|
|
/* assume region is at the start of the first row */
|
|
regStart = start_row << raid->stripeShift;
|
|
/* assume this IO needs the full row - we'll adjust if not true */
|
|
regSize = stripSize;
|
|
|
|
/* Check if we can send this I/O via FastPath */
|
|
if (raid->capability.fpCapable) {
|
|
if (isRead)
|
|
io_info->fpOkForIo = (raid->capability.fpReadCapable &&
|
|
((num_strips == 1) ||
|
|
raid->capability.
|
|
fpReadAcrossStripe));
|
|
else
|
|
io_info->fpOkForIo = (raid->capability.fpWriteCapable &&
|
|
((num_strips == 1) ||
|
|
raid->capability.
|
|
fpWriteAcrossStripe));
|
|
} else
|
|
io_info->fpOkForIo = FALSE;
|
|
|
|
if (numRows == 1) {
|
|
/* single-strip IOs can always lock only the data needed */
|
|
if (num_strips == 1) {
|
|
regStart += ref_in_start_stripe;
|
|
regSize = numBlocks;
|
|
}
|
|
/* multi-strip IOs always need to full stripe locked */
|
|
} else if (io_info->IoforUnevenSpan == 0) {
|
|
/*
|
|
* For Even span region lock optimization.
|
|
* If the start strip is the last in the start row
|
|
*/
|
|
if (start_strip == (start_row + 1) * raid->rowDataSize - 1) {
|
|
regStart += ref_in_start_stripe;
|
|
/* initialize count to sectors from startref to end
|
|
of strip */
|
|
regSize = stripSize - ref_in_start_stripe;
|
|
}
|
|
|
|
/* add complete rows in the middle of the transfer */
|
|
if (numRows > 2)
|
|
regSize += (numRows-2) << raid->stripeShift;
|
|
|
|
/* if IO ends within first strip of last row*/
|
|
if (endStrip == endRow*raid->rowDataSize)
|
|
regSize += ref_in_end_stripe+1;
|
|
else
|
|
regSize += stripSize;
|
|
} else {
|
|
/*
|
|
* For Uneven span region lock optimization.
|
|
* If the start strip is the last in the start row
|
|
*/
|
|
if (start_strip == (get_strip_from_row(instance, ld, start_row, map) +
|
|
SPAN_ROW_DATA_SIZE(map, ld, startlba_span) - 1)) {
|
|
regStart += ref_in_start_stripe;
|
|
/* initialize count to sectors from
|
|
* startRef to end of strip
|
|
*/
|
|
regSize = stripSize - ref_in_start_stripe;
|
|
}
|
|
/* Add complete rows in the middle of the transfer*/
|
|
|
|
if (numRows > 2)
|
|
/* Add complete rows in the middle of the transfer*/
|
|
regSize += (numRows-2) << raid->stripeShift;
|
|
|
|
/* if IO ends within first strip of last row */
|
|
if (endStrip == get_strip_from_row(instance, ld, endRow, map))
|
|
regSize += ref_in_end_stripe + 1;
|
|
else
|
|
regSize += stripSize;
|
|
}
|
|
|
|
pRAID_Context->timeoutValue = map->raidMap.fpPdIoTimeoutSec;
|
|
if ((instance->pdev->device == PCI_DEVICE_ID_LSI_INVADER) ||
|
|
(instance->pdev->device == PCI_DEVICE_ID_LSI_FURY))
|
|
pRAID_Context->regLockFlags = (isRead) ?
|
|
raid->regTypeReqOnRead : raid->regTypeReqOnWrite;
|
|
else
|
|
pRAID_Context->regLockFlags = (isRead) ?
|
|
REGION_TYPE_SHARED_READ : raid->regTypeReqOnWrite;
|
|
pRAID_Context->VirtualDiskTgtId = raid->targetId;
|
|
pRAID_Context->regLockRowLBA = regStart;
|
|
pRAID_Context->regLockLength = regSize;
|
|
pRAID_Context->configSeqNum = raid->seqNum;
|
|
|
|
/*Get Phy Params only if FP capable, or else leave it to MR firmware
|
|
to do the calculation.*/
|
|
if (io_info->fpOkForIo) {
|
|
retval = io_info->IoforUnevenSpan ?
|
|
mr_spanset_get_phy_params(instance, ld,
|
|
start_strip, ref_in_start_stripe,
|
|
io_info, pRAID_Context, map) :
|
|
MR_GetPhyParams(instance, ld, start_strip,
|
|
ref_in_start_stripe, io_info,
|
|
pRAID_Context, map);
|
|
/* If IO on an invalid Pd, then FP is not possible.*/
|
|
if (io_info->devHandle == MR_PD_INVALID)
|
|
io_info->fpOkForIo = FALSE;
|
|
return retval;
|
|
} else if (isRead) {
|
|
uint stripIdx;
|
|
for (stripIdx = 0; stripIdx < num_strips; stripIdx++) {
|
|
retval = io_info->IoforUnevenSpan ?
|
|
mr_spanset_get_phy_params(instance, ld,
|
|
start_strip + stripIdx,
|
|
ref_in_start_stripe, io_info,
|
|
pRAID_Context, map) :
|
|
MR_GetPhyParams(instance, ld,
|
|
start_strip + stripIdx, ref_in_start_stripe,
|
|
io_info, pRAID_Context, map);
|
|
if (!retval)
|
|
return TRUE;
|
|
}
|
|
}
|
|
|
|
#if SPAN_DEBUG
|
|
/* Just for testing what arm we get for strip.*/
|
|
if (io_info->IoforUnevenSpan)
|
|
get_arm_from_strip(instance, ld, start_strip, map);
|
|
#endif
|
|
return TRUE;
|
|
}
|
|
|
|
/*
|
|
******************************************************************************
|
|
*
|
|
* This routine pepare spanset info from Valid Raid map and store it into
|
|
* local copy of ldSpanInfo per instance data structure.
|
|
*
|
|
* Inputs :
|
|
* map - LD map
|
|
* ldSpanInfo - ldSpanInfo per HBA instance
|
|
*
|
|
*/
|
|
void mr_update_span_set(struct MR_FW_RAID_MAP_ALL *map,
|
|
PLD_SPAN_INFO ldSpanInfo)
|
|
{
|
|
u8 span, count;
|
|
u32 element, span_row_width;
|
|
u64 span_row;
|
|
struct MR_LD_RAID *raid;
|
|
LD_SPAN_SET *span_set, *span_set_prev;
|
|
struct MR_QUAD_ELEMENT *quad;
|
|
int ldCount;
|
|
u16 ld;
|
|
|
|
|
|
for (ldCount = 0; ldCount < MAX_LOGICAL_DRIVES; ldCount++) {
|
|
ld = MR_TargetIdToLdGet(ldCount, map);
|
|
if (ld >= MAX_LOGICAL_DRIVES)
|
|
continue;
|
|
raid = MR_LdRaidGet(ld, map);
|
|
for (element = 0; element < MAX_QUAD_DEPTH; element++) {
|
|
for (span = 0; span < raid->spanDepth; span++) {
|
|
if (map->raidMap.ldSpanMap[ld].spanBlock[span].
|
|
block_span_info.noElements <
|
|
element + 1)
|
|
continue;
|
|
span_set = &(ldSpanInfo[ld].span_set[element]);
|
|
quad = &map->raidMap.ldSpanMap[ld].
|
|
spanBlock[span].block_span_info.
|
|
quad[element];
|
|
|
|
span_set->diff = quad->diff;
|
|
|
|
for (count = 0, span_row_width = 0;
|
|
count < raid->spanDepth; count++) {
|
|
if (map->raidMap.ldSpanMap[ld].
|
|
spanBlock[count].
|
|
block_span_info.
|
|
noElements >= element + 1) {
|
|
span_set->strip_offset[count] =
|
|
span_row_width;
|
|
span_row_width +=
|
|
MR_LdSpanPtrGet
|
|
(ld, count, map)->spanRowDataSize;
|
|
printk(KERN_INFO "megasas:"
|
|
"span %x rowDataSize %x\n",
|
|
count, MR_LdSpanPtrGet
|
|
(ld, count, map)->spanRowDataSize);
|
|
}
|
|
}
|
|
|
|
span_set->span_row_data_width = span_row_width;
|
|
span_row = mega_div64_32(((quad->logEnd -
|
|
quad->logStart) + quad->diff),
|
|
quad->diff);
|
|
|
|
if (element == 0) {
|
|
span_set->log_start_lba = 0;
|
|
span_set->log_end_lba =
|
|
((span_row << raid->stripeShift)
|
|
* span_row_width) - 1;
|
|
|
|
span_set->span_row_start = 0;
|
|
span_set->span_row_end = span_row - 1;
|
|
|
|
span_set->data_strip_start = 0;
|
|
span_set->data_strip_end =
|
|
(span_row * span_row_width) - 1;
|
|
|
|
span_set->data_row_start = 0;
|
|
span_set->data_row_end =
|
|
(span_row * quad->diff) - 1;
|
|
} else {
|
|
span_set_prev = &(ldSpanInfo[ld].
|
|
span_set[element - 1]);
|
|
span_set->log_start_lba =
|
|
span_set_prev->log_end_lba + 1;
|
|
span_set->log_end_lba =
|
|
span_set->log_start_lba +
|
|
((span_row << raid->stripeShift)
|
|
* span_row_width) - 1;
|
|
|
|
span_set->span_row_start =
|
|
span_set_prev->span_row_end + 1;
|
|
span_set->span_row_end =
|
|
span_set->span_row_start + span_row - 1;
|
|
|
|
span_set->data_strip_start =
|
|
span_set_prev->data_strip_end + 1;
|
|
span_set->data_strip_end =
|
|
span_set->data_strip_start +
|
|
(span_row * span_row_width) - 1;
|
|
|
|
span_set->data_row_start =
|
|
span_set_prev->data_row_end + 1;
|
|
span_set->data_row_end =
|
|
span_set->data_row_start +
|
|
(span_row * quad->diff) - 1;
|
|
}
|
|
break;
|
|
}
|
|
if (span == raid->spanDepth)
|
|
break;
|
|
}
|
|
}
|
|
#if SPAN_DEBUG
|
|
getSpanInfo(map, ldSpanInfo);
|
|
#endif
|
|
|
|
}
|
|
|
|
void
|
|
mr_update_load_balance_params(struct MR_FW_RAID_MAP_ALL *map,
|
|
struct LD_LOAD_BALANCE_INFO *lbInfo)
|
|
{
|
|
int ldCount;
|
|
u16 ld;
|
|
struct MR_LD_RAID *raid;
|
|
|
|
for (ldCount = 0; ldCount < MAX_LOGICAL_DRIVES; ldCount++) {
|
|
ld = MR_TargetIdToLdGet(ldCount, map);
|
|
if (ld >= MAX_LOGICAL_DRIVES) {
|
|
lbInfo[ldCount].loadBalanceFlag = 0;
|
|
continue;
|
|
}
|
|
|
|
raid = MR_LdRaidGet(ld, map);
|
|
|
|
/* Two drive Optimal RAID 1 */
|
|
if ((raid->level == 1) && (raid->rowSize == 2) &&
|
|
(raid->spanDepth == 1) && raid->ldState ==
|
|
MR_LD_STATE_OPTIMAL) {
|
|
u32 pd, arRef;
|
|
|
|
lbInfo[ldCount].loadBalanceFlag = 1;
|
|
|
|
/* Get the array on which this span is present */
|
|
arRef = MR_LdSpanArrayGet(ld, 0, map);
|
|
|
|
/* Get the Pd */
|
|
pd = MR_ArPdGet(arRef, 0, map);
|
|
/* Get dev handle from Pd */
|
|
lbInfo[ldCount].raid1DevHandle[0] =
|
|
MR_PdDevHandleGet(pd, map);
|
|
/* Get the Pd */
|
|
pd = MR_ArPdGet(arRef, 1, map);
|
|
|
|
/* Get the dev handle from Pd */
|
|
lbInfo[ldCount].raid1DevHandle[1] =
|
|
MR_PdDevHandleGet(pd, map);
|
|
} else
|
|
lbInfo[ldCount].loadBalanceFlag = 0;
|
|
}
|
|
}
|
|
|
|
u8 megasas_get_best_arm(struct LD_LOAD_BALANCE_INFO *lbInfo, u8 arm, u64 block,
|
|
u32 count)
|
|
{
|
|
u16 pend0, pend1;
|
|
u64 diff0, diff1;
|
|
u8 bestArm;
|
|
|
|
/* get the pending cmds for the data and mirror arms */
|
|
pend0 = atomic_read(&lbInfo->scsi_pending_cmds[0]);
|
|
pend1 = atomic_read(&lbInfo->scsi_pending_cmds[1]);
|
|
|
|
/* Determine the disk whose head is nearer to the req. block */
|
|
diff0 = ABS_DIFF(block, lbInfo->last_accessed_block[0]);
|
|
diff1 = ABS_DIFF(block, lbInfo->last_accessed_block[1]);
|
|
bestArm = (diff0 <= diff1 ? 0 : 1);
|
|
|
|
/*Make balance count from 16 to 4 to keep driver in sync with Firmware*/
|
|
if ((bestArm == arm && pend0 > pend1 + 4) ||
|
|
(bestArm != arm && pend1 > pend0 + 4))
|
|
bestArm ^= 1;
|
|
|
|
/* Update the last accessed block on the correct pd */
|
|
lbInfo->last_accessed_block[bestArm] = block + count - 1;
|
|
|
|
return bestArm;
|
|
}
|
|
|
|
u16 get_updated_dev_handle(struct LD_LOAD_BALANCE_INFO *lbInfo,
|
|
struct IO_REQUEST_INFO *io_info)
|
|
{
|
|
u8 arm, old_arm;
|
|
u16 devHandle;
|
|
|
|
old_arm = lbInfo->raid1DevHandle[0] == io_info->devHandle ? 0 : 1;
|
|
|
|
/* get best new arm */
|
|
arm = megasas_get_best_arm(lbInfo, old_arm, io_info->ldStartBlock,
|
|
io_info->numBlocks);
|
|
devHandle = lbInfo->raid1DevHandle[arm];
|
|
atomic_inc(&lbInfo->scsi_pending_cmds[arm]);
|
|
|
|
return devHandle;
|
|
}
|